翻译高手请进，，，！！汉译英，！

Disaster tourism is out of memory, education, scientific expedition, and other purposes, and disaster-related things like targeting tourism. It can make people aware disasters and pondered disaster events, taught disaster reduction. Tourism is the system using the system of ideas and methods on tourism. From economics, geography, sociology, management and other related disciplines point of view, application systems thinking and methods to establish the tourism model, including the source, destination, travel systems, environmental systems four subsystems. To further elucidate the interaction between the various subsystems, tourism has also introduced a system model travel patterns. Disaster tourism is part of tourism, it is an open, dynamic system. Disaster tourism model system is conducive to the establishment of a comprehensive study of tourism nature of disasters, solve practical problems.